KR101036025B1 - Power line communication system. - Google Patents

Abstract

The apparatus of the present invention generally uses a halogen lamp as a power line communication control system for lighting control used in an aeronautical lighting control system for guiding takeoff and landing of an aircraft. Since the halogen lamps are connected in series and driven, AC power is supplied and a halogen lamp driving transformer is connected in series to prevent the entire lamp from turning off even if only one lamp is disconnected. Therefore, even if the halogen lamp is disconnected, other halogen lamps have the advantage of being driven normally, but there are many difficulties in power line communication for the ON / OFF control of the halogen lamps individually. The invention is characterized in that the power line communication is facilitated.

Power line communication, aviation lighting control

Description

Power line communication system. {Power line communication system.}

The present invention is an apparatus for controlling an airlighting for aviation takeoff and landing guidance, which is an apparatus for controlling the control method using power line communication.

In addition to the two electric lines for driving a halogen lamp, a communication method using a power line is most effective for controlling without a separate control line. Such a power line communication method is well known in the art.

In the present invention, in order to individually turn on / off the aviation lighting module to be controlled in the central control room, a central control microcomputer board and an equalization control microcomputer board are installed to attach power line modems to enable power line communication with each other. Communication protocol technology is needed, such as a lamp failure message to the central control room if a halogen lamp is disconnected by the end of its life.

As described above, such techniques are commonly used by those in the art, and are still used in this way.

However, power line communication requires very difficult technology or special ideas when power line communication is not possible depending on various facility conditions. In particular, in the present invention, power line communication is theoretically sufficiently solved that communication is impossible due to a halogen lamp driving transformer. Because the transformer is designed and manufactured to meet the commercial frequency of 50 / 60Hz. However, in order to perform power line communication, a higher frequency than this is used, and this high frequency component is blocked by the transformer, and thus a problem occurs in which the communication cannot be performed.

The present invention is a power line communication control device for controlling an airlighter, and is an invention device for enabling communication even in a very difficult state of power line conditions. In the case of aviation lamp power supply, the constant current method is mainly used to supply two-wire electric power. The reason for using the constant current method is to connect and drive in series irrespective of the number of aerodrome lighters and to allow other lamps to operate even if the driving lamp is disconnected. For example, as shown in FIG. 1, if the transformer is connected in series and the power is to use alternating current, even if the lamp is disconnected, the transformer is connected to the power supply network so that the power can be continuously supplied.

As described above, the structure of the airlighter is preferably configured as described above. In the present invention, in order to enable individual control of each of the air-lighting device is an invention device for enabling the ON / OFF of the lamp, the system check, etc. using power line communication.

The present invention is an invention device for controlling a load device driven by an AC constant current power supply device,

In the case of the aviation equalizer power supply, two-wire power supply is provided for easy installation and reduction of facility costs. Here, the power supply mainly uses a constant current power method to drive the lamp with a constant brightness over a long distance. In addition, the constant current driving method has an advantage in that it can be configured and driven in series regardless of the number of aviation equalizer driving. In addition, in order to operate another lamp even if the driving lamp is disconnected, power is supplied to the lamp by using a transformer in series as shown in FIG. 1.

Attaching the power line communication module to 204 of FIG. 2 to use power line communication attenuates the modulated signal for most power line communication by the transformer 205, making communication very difficult. In particular, when a large number of transformers are attached in series, the inductance of the transformer is increased and the signal is extremely attenuated so that the modulated signal is hardly transmitted. Thus, power line communication cannot be performed. Only by solving these problems will powerline communication be achieved.

In addition, a special method will have to be used to detect the disconnection of lamps. Individually turning on / off the lamps of the airlighter must be open or shorted across the lamp. If the lamp is shorted at both ends, it will be difficult to tell whether the lamp is normal or broken. In the present invention, a means for detecting whether the lamp is disconnected is required regardless of the ON / OFF state of the lamp.

The present invention is a power line communication system that can be used in an AC constant current power supply. If you attach an aeronautical equalizer, it is only natural that all equalizers must be connected in series because it is a constant current. Also, halogen lamps or LED lamps are mainly used inside the equalizer. If only one lamp is disconnected, all the equalizers will be turned off. Therefore, in order to solve such a problem, the transformer 103 is configured in series with the AC constant current power supply 101 in the same manner as in FIG. 1 so that the remaining lamps are turned on even when the lamp 102 is disconnected.

In this way, the whole power can be ON / OFF, but power line communication will be needed to control ON / OFF individually or monitor the status of lamp failure or current and voltage flowing through the lamp. 2 is a configuration diagram for communicating with a power line communication control terminal 204 and a power line communication control server 202.

When using transformers 205, 205-1, and 205-n in the AC constant current power supply driving method, all modulation signals are cut off due to the inductance of the transformer, so that power line communication devices 202, 204, and ( 204-1), communication with (204-n) is not possible. The present invention is an invention of a power line communication control device characterized in that power line communication is possible in such a situation.

In order to solve the above problems, it is necessary to make a special transformer. In the case of FIG. 3, a condenser 307 and a coil 309 are attached to both ends of the primary winding of the transformer 303 as a means for preventing the modulation signal for power line communication from being cut off, and a power line between the primary and secondary of the transformer. Capacitors 306 and 307 are attached to allow high frequency signals to pass through. Of course, depending on the characteristics of the transformer, it is also possible to connect the capacitor and the coil in series / parallel to (306) or (307). Similarly, it is well understood that the circuit wiring method can vary sufficiently according to the characteristics of the transformer by those who have a description of the network theory.

It is important to attach the resonant circuit corresponding to the modulation signal for power line communication to the transformer peripheral circuit to block the modulation signal for power line communication caused by the transformer so that the modulation signal can be transmitted smoothly to control each lamp. In addition, it is possible to learn information about each lamp module.

There are many ways to know whether the lamp is disconnected, but it is impossible to detect the disconnection after the lamp is shorted by the general method. In the present invention, as shown in FIG. 6, the invention is characterized in that it can be detected in real time regardless of the short or the open at both ends of the lamp.

Although the apparatus of the present invention cannot perform power line communication in a system with a series transformer of an AC constant current power supply system, the apparatus of the present invention can smooth power line communication, and thus, a very large effect can be obtained for special purpose power line communication. As shown in the present invention, as in the case of the aeronautical lighting guide device, it is possible to monitor an individual device control or a failure, so that the administrator can quickly take necessary measures according to the information on the system.

The present invention device is an invention device that enables power line communication in a system with a transformer of an AC constant current power supply system. Specific embodiments of the present invention are as follows.

Example 1 Power Line Communication Configuration

AC constant current power supply 401 and a plurality of specially manufactured transformers 405, 405-1, and 405-n are installed so that power is supplied to each transformer. The power line communication client modules 404, 404-1, and 404-n are provided, and the microcomputer control device of the power line communication client configures a circuit to control a halogen lamp which is an aviation equalizer.

The AC constant current power supply 401 mainly performs phase control as a method for allowing a constant current to flow at all times. Therefore, unwanted noise may be generated by the phase control. Therefore, the filter circuit may be configured in the power line server module 402 to remove the noise. Therefore, noise may be transmitted to each of the transformers 404, 404-1, and 404-n. Configure the circuit so that it does not go.

When the modulation signal is transmitted for data transmission in the power line communication server module, the modulation signal is attenuated mostly due to the inductance component of the transformer, and thus data communication is impossible. Therefore, a transformer constructed by a special method in the present invention should be used. This transformer 401 should be connected to form a circuit as shown in (300) of FIG. Here, in the detailed description of FIG. 3, the power line connection terminals 301 and 302 are terminals for connecting to a power supply line, and the capacitors 306 and 307 are well-transmitted so that the modulation signal of the power line communication module 304 is well transmitted. The condenser 308 and the inductance 309 are means for transmitting the modulated signal well to the power line communication server module and the other power line communication module connected in series with the modulation signal generated in the power line communication module. If there is no 306, 307, 308, 309, the inherent inductance of the transformer 301 will not be able to deliver the modulated signal.

As described above, the power line communication system is characterized in that the transformer is specially configured as shown in FIG.

Example 2 Power Line Communication Method Resistant to Noise Signals

In the case of an AC constant current power supply, it is common to make current control phase control. This phase control is accompanied by a lot of noise, especially when connected to the transformer will generate a second noise. Therefore, a filter circuit should be attached at the end of the power supply. In addition, if the filter is configured within a range that does not significantly affect the phase control, it is difficult to form a perfect filter. 5 shows a waveform of an AC constant current power supply, and power starts to be supplied at trigger points 501 and 501 '. In other words, power is supplied by an area of 503 and 503 ', and 502 and 502' denote a state in which power is not supplied.

When the phase controlled power is supplied from the transformer 405, strong noise is generated at points 501 and 501 'of the phase control waveform. In this case, when power line communication is performed, a case may occur in which a power line modulated signal is not detected.

The present invention proposes a method for preventing power line communication even when noise caused by phase control occurs as follows.

When driving a legster such as a triac, there are many cases in which a zero cross point is captured and a driving signal is given. In contrast, the present invention detects a point 501 where a voltage is captured, and outputs a modulated signal for power line communication after a slight delay at the captured point. In this way, there is an advantage that data loss can be prevented by powerful noise in the middle of the data. In the present invention, data communication is performed in this manner.

Specifically, since the position change of the phase-controlled trigger signals 501 and 501 'of the constant current power may occur, the voltage may be changed by the A / D converter of the microcomputer control unit in the power line communication module as a means for detecting the position of the phase. The phase can be detected by reading or using a voltage detector. Therefore, when the trigger signal 501 is detected, the trigger signal 501 'can be predicted, so that the data signal for power line communication transmits the data signal and generates noise during the periods 510 and 510'. ) And (511 ') program processing so as not to perform data communication.

As described above, the constant current power supply device is an invention device having a feature that can significantly lower the error rate of data communication by allowing power line communication to avoid a location where strong noise occurs due to phase control.

Example 3) Real-time detection method of lamp failure (with or without disconnection)

The lamp for the aviation lighting is configured in series with the transformer primary winding as shown in FIG. 1 and attaches the lamp to the secondary winding. If only a specific lamp is off, short the both ends of the lamp. Since the power supply is a constant current driving method, the lamp is turned off in the same manner as described above. Normally, anyone in this field knows well. However, in order to detect a failure of the lamp in the OFF state of the lamp is not possible with the general method, the present invention was invented by a special method as shown in FIG.

The constant current supply is supplied to 603 and 604, and the lamp 607 will be turned on if the switching circuit 605 is OFF. Here, the high frequency transformers 601 and 602 have a very low impedance with respect to the commercial frequency (50 Hz / 60 Hz), so the lamp is normally turned on. If the switching circuit 605 is ON, the lamp is turned OFF as the current flows through the switching circuit 605. The switching circuit may be configured as a relay or a semiconductor device.

When a signal is transmitted from the high frequency oscillator 608 to the high frequency transformer 601 to detect a lamp break, the high frequency signal is transmitted through the condenser 606 regardless of whether the switching circuit 605 is ON or OFF. Is normal, signal transmission to the high frequency transformer 602 is performed. However, if the lamp 607 is disconnected, the high frequency signal cannot be transmitted to the high frequency transformer 602. When the signal is transmitted to the high frequency transformer 602, the detection device 609 may detect the signal and transmit the signal to the microcomputer 610 to process the signal.

Here, the high frequency signal generally means a frequency higher than a commercial frequency.

The detection device 609 may have various methods. An embodiment of the present invention may use a method of outputting a control signal when a signal having a specific frequency is received using a tone decoding control scheme.

Example 4 Alternative Method of Real Time Detection of Lamp Failure

Embodiment 4) of the present invention can detect the presence or absence of lamp disconnection regardless of the ON or OFF of the lamp as in the third embodiment. The operation method is similar, but it has the advantage of reducing the number of peripheral circuits.

In FIG. 7, the AC constant current supply is supplied to 701 and 702, and the lamp 706 is turned off and on as the switching circuit 703 is ON or OFF. In general, since the AC constant current supply device performs phase control, the instantaneous voltage rapidly increases as shown in 501 and 501 'of FIG. In the present invention, it is intended to detect the presence or absence of lamp disconnection by using a sudden increase in the instantaneous voltage. As a general rule, an AC phase control constant current device has a frequency of 50 Hz or 60 Hz, but the instantaneous frequency when the above-mentioned instantaneous voltage rises can be considered to be quite high. Here, such a signal will be referred to as a high frequency signal A. If the lamp 706 is normal when the switching circuit 703 is turned off, the high frequency signal A will be resonated with the capacitor 704 to send a necessary signal to the detection device 708 if the lamp 706 is normal. . If the lamp is broken, the high-frequency transformer 707 is open to the circuit, so that it cannot be delivered to the detector 708.

If the switching circuit 703 is ON, the lamp is turned off. The high frequency transformer 707 has a very low impedance for low frequencies, so the high frequency transformer can be ignored. In addition, since the switching circuit mainly uses a triac, which is a semiconductor element, the voltage drop is about 0.7V, so the voltage applied to the lamp is very low and turned off. However, since the voltage drop in the switching circuit is not 0V, it is possible to check the lamp disconnection. Even if the switching circuit is turned on, a voltage drop of about 0.7V occurs, so there is no problem in the lamp disconnection inspection. This is because the phase controlled high frequency signal A is sufficiently transmitted to the high frequency transformer 707.

In the figure, 705 is an element for filtering the modulation frequency required for power line communication and is irrelevant to the lamp disconnection test.

As described above, the present invention is characterized in that the power line communication in the noise is more effective and reduce the error rate to communicate, and to detect the presence or absence of lamp failure regardless of the lamp ON / OFF.

Figure 1. Connection diagram of the load device of the constant current power supply method.

2. Transformer with power line communication modem attached in the constant current power supply system is not possible communication.

3 is a transformer structure for smoothly transmitting a modulated signal of a power line communication device.

Figure 4 is attached to the power line communication modem in the constant current power supply method.

Figure 5 is a diagram for describing a method for power line communication avoiding noise due to phase control.

6. A diagram for explaining a lamp failure (disruption) detection method.

7. A diagram for explaining a lamp failure (disruption) detection method.

Claims (3)

It is a device to detect disconnection of halogen lamp or LED lamp. It is configured in series with the lamp and the transformer primary side, and provided with a semiconductor switching circuit in parallel at both ends of the lamp and the transformer so as to control the lamp ON or OFF, And a means for detecting the presence or absence of lamp disconnection on the transformer secondary side, regardless of whether the semiconductor switching circuit is ON or OFF. It is a device to detect disconnection of halogen lamp or LED lamp. The lamp is configured in series with the transformer primary side (A), the switching circuit capable of controlling the lamp ON or OFF and the transformer in series by means for inputting a high frequency signal (B), and the switching circuit A capacitor is attached to both ends of the switching circuit for the high frequency signal to pass even if the signal is turned off, and the (A) and (B) are connected in parallel, and the lamp is turned on the transformer secondary side regardless of whether the switching circuit is ON or OFF. A lamp disconnection detecting apparatus, comprising means for detecting the presence or absence of disconnection. The method according to claim 1 or 2, In a device for power line communication in a phase controlled constant current drive power supply, In order to solve the disturbance of power line data communication, the power supply generates strong noise at the phase control trigger position. Means for detecting a phase control trigger signal of a constant current drive power supply device, a microcomputer control unit capable of predicting the start of the trigger signal and a next trigger signal, a module for power line data communication avoiding a position where the trigger signal occurs, and Lamp disconnection detection device, characterized in that for transmitting the presence or absence of lamp disconnection to the power line data communication module.

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